Example 2. Use the forward-substitution method to solve the lower-triangular linear system  .  
Use the menu "Input" then submenu "Create Table/Matrix/Palette" to enter matrix A and vector B.

Solution 2.

Then perform forward-substitution.

Verify the solution.

To do it in decimals, you can enter decimal values in the matrix and vector.

But why require yourself to type all those decimal points ?
The same thing could be accomplished by using the convert to numerical function, that's the reserved word  .

Verify the solution.

(c) John H. Mathews 2003